Basically this would mean one dedicated storage area for config.xml files together with a short description.Preconfigured VMware appliances (additional to the one release version) could be located there as well.This might help in some situaltions but I don't see the overwhelming need for this.

The Wiki seems to be a reasonable good place for this (where the appliance already resides). At portal.pfsense.com you are doing something like this as well but with a different intention.